Abstract
Recently, it has been suggested, that differentiated cells are more resistant to the apoptotic effect of DNA damaging agents possibly due to the decreased activity of “damage detecting/apoptosis triggering” mechanism. Previously, we have shown, that PMA pretreatment reduced etoposide-(ETO) but enhanced staurosporine- (STA) -induced apoptosis in HT58 cells. Data presented here show that the HT58 human, “mature” B-lymphoma cells exposed to PMA secrete more IgM into the supernatant indicating commitment of cells to perform differentiated function. The sensitivity of HT58 cells to ETO- or STA-induced apoptosis is influenced diversely with PMA pre- or posttreatment. Interestingly, the DNA damage (gamma radiation, bleomycin, ETO) or okadaic acic (30 nM) reduced the [PMA+STA] - induced apoptosis.
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Abbreviations
- BLEO:
-
bleomycin
- CDK:
-
cyclin dependent kinase
- CONT:
-
control
- ETO:
-
etoposide
- i-anti-IgM:
-
immobilized antihuman IgM antibody
- OKA:
-
okadaic acid
- PFC:
-
plaque forming cells
- PI:
-
propidium iodide
- PMA:
-
phorbol 12-myristate 13-acetate
- RAD:
-
gamma irradiation
- s-anti IgM:
-
solubilised anti-human IgM antibody
- STA:
-
staurosporine
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Mihalik, R., Uher, F., PetÁk, I. et al. Regulation of differentiation, proliferation and drug-induced apoptosis in HT58 lymphoma cells. Pathol. Oncol. Res. 3, 100–105 (1997). https://doi.org/10.1007/BF02907802
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DOI: https://doi.org/10.1007/BF02907802